I’ll add to this thread as I find more interesting items. Please feel free to contribute.

I was accepted into the Windows XP x64 Beta program in late 2004. Back then I didn’t download everything, only the OSs I was interested in. Most are gone now after dumping old OSs to conserve space on the storage drive.

Benchmarks from 4 various XP x64 builds using PassMark Performance Test


Benchmarks from Longhorn build 4074 x64 & XP build 1218 x64 (highest scores above)


MS added a keylogger to the RTM build (1830) of XP x64

Here is some stuff from build 1218





XP x64 CP




There were 2 - XP Pro x64 1218 builds, minor benchmark differences (w/ the latter build having slightly higher scores almost across the board) + the size & dates were different.

From the WinBeta .nfo
.

Edit: I noticed this was my first 64 bit rig. Back then the 3COM 3C940 Gbit LAN controller had a x86 driver only. Thus I learned real quick how to decorate the .inf driver file to make it work as a x64 driver. Part of the learning process testing XP x64 on the available hardware back then.
My first 64 bit rig MB: ASUS K8V Deluxe, socket 754

You mean revision 1218 rather. At least that's how I think it should be considered anyway.
Nice find, some interesting stuff to say the least. Those benchmarks are interesting, especially since they're up against 4074x64.
Using a keylogger for parental controls is rather interesting, not just as a solution, but as a security loophole too.

Quote from MS PM

*Now that you mention it, I notice that on the Desktop build info they refer to it as v. (version)
NTL:
These are from build 1433

Utilities & docs that were available


Thunking Server was included w/ this one, maybe the others too


* Twunk_16.exe Thunking Server
Part of the Thunking layer of COM - It allows 16 and 32 bit programs (such as old versions of office and modern applications) to interact.
http://answers.yahoo.com/question/index ... 833AA1N2kc
more info: http://searchtasks.answersthatwork.com/ ... e=Twunk_16

My point of the build/revision thing is as follows:
MajorVersion.MinorVersion.Build.Revision, i.e. the format of ntverkp.h from what I learned from Kenneth.

This of course makes 7.0.2001.1546.
That's why I say revision, because that's the actual revision of the OS.
However it's an interesting debate; Microsoft using revisions as builds. Only because they were really messing with things other than the base, that's my guess as to why the actual build number didn't change. Here, there's no right or wrong really, just personal preference and this is my evidence to back up my preference. Technically, they just compiled new revisions of the software.

As for version, the same was with Build 3790.1232.

Do you still have the documents that were available?

Ahhh no, all I could find are these, don’t look to interesting though.
They appear to be from my Site Transfer of documents from the 1812 interim build.


& these Release notes (15 pages)

I also installed from the Avalon CTP the WinFX SDK on build 1289.
Here are a couple of screenshots





Window example in WinFX